C Programming Questions and Answers on Command Line Arguments for Freshers

1. What does argv and argc indicate in command-line arguments?
    (Assuming: int main(int argc, char *argv[]) )

a) argument count, argument variable
b) argument count, argument vector
c) argument control, argument variable
d) argument control, argument vector

Answer: b

2. Which of the following syntax is correct for command-line arguments?

a) int main(int var, char *varg[])
b) int main(char *argv[], int argc)
c) int main()
    {
        int argv, char *argc[];
    }
d) none of the mentioned

Answer: a
 

3. In linux, argv[0] by command-line argument can be occupied by

a) ./a.out
b) ./test
c) ./fun.out.out
d) all of the mentioned

Answer: d

4. What type of array is generally generated in Command-line argument?

a) Single dimension array
b) 2-Dimensional Square Array
c) Jagged Array
d) 2-Dimensional Rectangular Array

Answer: c

5. What would be the output if we try to execute following segment of code (assuming the     following input “cool brother in city”)?

  printf(“%s\n”, argv[argc]);

a) (null)
b) City
c) In
D. Segmentation Fault

Answer: a

6. The first argument in command line arguments is

a) The number of command-line arguments the program was invoked with;
b) A pointer to an array of character strings that contain the arguments
c) Nothing
d) None of the mentioned

Answer: a

7. The second (argument vector) in command line arguments is

a) The number of command-line arguments the program was invoked with;
b) A pointer to an array of character strings that contain the arguments,one per string.
c) Nothing
d) None of the mentioned

Answer: b

8. argv[0] in command line arguments, is

a) The name by which the program was invoked
b) The name of the files which are passed to the program
c) Count of the arguments in argv[] vector
d) None of the mentioned

Answer: a

9. A program that has no command line arguments will have argc

a) Zero
b) Negative
c) One
d) Two

Answer: c

10. The index of the last argument in command line arguments is

a) argc – 2
b) argc + 1
c) argc
d) argc – 1

Answer: d

11. What is the output of this C code (if run with no options or arguments)?

1.     #include 

2.     int main(int argc, char *argv[])

3.     {

4.         printf("%d\n", argc);

5.         return 0;

6.     }

a) 0
b) 1
c) Depends on the platform
d) Depends on the compiler

Answer: b

12. What is the output of this C code (run without any commandline arguments)?

1.     #include 

2.     int main(int argc, char *argv[])

3.     {

4.         while (argc--)

5.         printf("%s\n", argv[argc]);

6.         return 0;

7.     }

a) Compile time error
b) Executablefilename
c) Segmentation fault
d) Undefined

Answer: b

13. What is the output of this C code (run without any commandline arguments)?

1.     #include 

2.     int main(int argc, char *argv[])

3.     {

4.         printf("%s\n", argv[argc]);

5.         return 0;

6.     }

a) Segmentation fault/code crash
b) Executable file name
c) Depends on the platform
d) Depends on the compiler

Answer: a

14. What is the output of this C code (run without any commandline arguments)?

1.     #include 

2.     int main(int argc, char *argv[])

3.     {

4.         while (*argv++ != NULL)

5.         printf("%s\n", *argv);

6.         return 0;

7.     }

a) Segmentation fault/code crash
b) Executable file name
c) Depends on the platform
d) Depends on the compiler

Answer: a

15. What is the output of this C code (run without any command line arguments)?

1.     #include 

2.     int main(int argc, char *argv[])

3.     {

4.         while (*argv  !=  NULL)

5.         printf("%s\n", *(argv++));

6.         return 0;

7.     }

a) Segmentation fault/code crash
b) Executable file name
c) Depends on the platform
d) Depends on the compiler

Answer: b

16. What is the output of this C code(run without any command line arguments)?

1.     #include 

2.     int main(int argc, char *argv[])

3.     {

4.         while (argv != NULL)

5.         printf("%s\n",  *(argv++));

6.         return 0;

7.     }

a) Segmentation fault/code crash
b) Executable file name
c) Depends on the platform
d) Depends on the compiler

Answer: a